Patents by Inventor Tatsuya Iijima

Tatsuya Iijima has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Publication number: 20240042790
    Abstract: The present invention includes: a shaft cylinder having an opening at a front end thereof, a tip holder movable in an axial direction of the shaft cylinder, a tip projectable and retractable in conjunction with a movement of the tip holder, an annular member loosely fitted onto an inner periphery of the opening of the shaft cylinder to be movable in an axial direction of the shaft cylinder with respect to the shaft cylinder, and an elastic member capable of connecting the tip holder and the annular member such that the tip holder and the annular member are movable relatively to each other. A contact surface tapered toward the front end is formed on at least a part of an outer periphery of the annular member. A cutout is formed at a part of the annular member such that an inner diameter of the annular member is reduced when a load is received by the contact surface. A guide surface tapered toward the front end is formed on the part of the inside surface of the shaft cylinder.
    Type: Application
    Filed: December 20, 2021
    Publication date: February 8, 2024
    Inventors: Tatsuya IIJIMA, Yuki ARISAKA
  • Patent number: 11667146
    Abstract: In a writing tool 1, a front shaft 5 is detachably provided on a rear shaft 6 containing an ink absorbent body 7. A filling part 51 is provided on an outside surface of a rear part of the front shaft 5. The filling part 51 detachably fits to a fitted part 61 formed on an inside surface of an opening part of the rear shaft 6. The filling part 51 has an outward-facing pressure contact part 53 and a radially penetrating slit 54. The fitted part 61 has an inward-facing pressure contact part 63. The front shaft 5 and the rear shaft 6 are brought into a pressure contact with each other when the front shaft 5 and the rear shaft 6 are fitted to each other.
    Type: Grant
    Filed: June 27, 2019
    Date of Patent: June 6, 2023
    Assignee: KABUSHIKI KAISHA PILOT CORPORATION
    Inventors: Hisatoshi Hayakawa, Tatsuya Iijima, Hisashi Iwata
  • Publication number: 20210252903
    Abstract: In a writing tool 1, a front shaft 5 is detachably provided on a rear shaft 6 containing an ink absorbent body 7. A filling part 51 is provided on an outside surface of a rear part of the front shaft 5. The filling part 51 detachably fits to a fitted part 61 formed on an inside surface of an opening part of the rear shaft 6. The filling part 51 has an outward-facing pressure contact part 53 and a radially penetrating slit 54. The fitted part 61 has an inward-facing pressure contact part 63. The front shaft 5 and the rear shaft 6 are brought into a pressure contact with each other when the front shaft 5 and the rear shaft 6 are fitted to each other.
    Type: Application
    Filed: June 27, 2019
    Publication date: August 19, 2021
    Inventors: Hisatoshi HAYAKAWA, Tatsuya IIJIMA, Hisashi IWATA
  • Patent number: 9842681
    Abstract: Disclosed is a litz wire coil that is configured by spirally winding a litz wire on one plane by a predetermined number of turns. The litz wire is configured by twisting together a plurality of enameled wires formed by baking an insulating film on a conducting body. Pressure shaping is performed such that the litz wire has a substantially rectangular shape in cross section, and the flatness ratio of the litz wire in cross section (long side/short side) is controlled at 1.10 to 1.60, preferably 1.20 to 1.40, more preferably 1.25 to 1.35.
    Type: Grant
    Filed: December 9, 2013
    Date of Patent: December 12, 2017
    Assignee: SWCC SHOWA CABLE SYSTEM CO., LTD.
    Inventors: Shirou Hasegawa, Masahiro Mori, Tatsuya Iijima, Kiyoshi Miura, Kenji Kamiya, Masahiro Ichikawa, Hiroto Nozaki
  • Publication number: 20150332841
    Abstract: Disclosed is a litz wire coil that is configured by spirally winding a litz wire on one plane by a predetermined number of turns. The litz wire is configured by twisting together a plurality of enameled wires formed by baking an insulating film on a conducting body. Pressure shaping is performed such that the litz wire has a substantially rectangular shape in cross section, and the flatness ratio of the litz wire in cross section (long side/short side) is controlled at 1.10 to 1.60, preferably 1.20 to 1.40, more preferably 1.25 to 1.35.
    Type: Application
    Filed: December 9, 2013
    Publication date: November 19, 2015
    Applicant: SWCC SHOWA DEVICE TECHNOLOGY CO., LTD.
    Inventors: Shirou HASEGAWA, Masahiro MORI, Tatsuya IIJIMA, Kiyoshi MIURA, Kenji KAMIYA, Masahiro ICHIKAWA, Hiroto NOZAKI
  • Patent number: 6773855
    Abstract: A photocurable and thermosetting resin composition comprises (A) a high purity synthetic silica powder having a uranium content of not more than 1.0 ppb, (B) a photosensitive prepolymer containing a carboxylic group and at least two ethylenically unsaturated groups in its molecule and having an acid value of solid content of 50 to 150 mg KOH/g, (C) a photosensitive (meth)acrylate compound, (D) a photopolymerization initiator, (E) an epoxy resin, and (F) a curing catalyst. A cured film which emits alpha rays at a fully low dose is obtained by forming a film of the composition on a substrate, subjecting the film to exposure to light and development, and finally curing the coating film by irradiation with active energy rays and/or thermal curing.
    Type: Grant
    Filed: May 14, 2003
    Date of Patent: August 10, 2004
    Assignee: Taiyo Ink Manufacturing Co., Ltd.
    Inventors: Tatsuya Iijima, Hirohide Sato, Takahiro Yoshida, Takeshi Yoda
  • Patent number: 6172829
    Abstract: A data recording and reproducing apparatus for recording and reproducing data on azimuth tracks of a magnetic tape in which the data may be audio data or computer data in any of several different computer data formats includes a controller that controls the recording and reproducing signal processing so as to be responsive to the four different kinds of data formats such that main data and subdata may be separated from the audio data and subcodes and error correction codes generated and appended to the data stream as required.
    Type: Grant
    Filed: September 15, 1998
    Date of Patent: January 9, 2001
    Assignee: Sony Corporation
    Inventors: Shinya Ozaki, Tatsuya Iijima, Masaki Yamada
  • Patent number: 5177314
    Abstract: An electronic musical instrument can execute a musical performance with two timbres mixed together by operating a single key, for example. Of the two timbres, a master timbre is set in normal mode and is stored in a first memory, while a slave timbre is selected in tone mix mode and is stored in a second memory. Each timbre can be altered as desired. To alter the master timbre, timbre switches are operated after the mode is temporarily changed to normal mode. To alter the slave timbre, the timbre switches are operated in tone mix mode. When the tone mix mode is set, this electronic musical instrument can permit a player to easily alter tone parameters such as the volume, pitch and attack delay time of each timbre.
    Type: Grant
    Filed: June 17, 1991
    Date of Patent: January 5, 1993
    Assignee: Casio Computer Co., Ltd.
    Inventors: Takashi Matsuda, Tatsuya Iijima
  • Patent number: 5134529
    Abstract: An apparatus and method for recording digital data employing a DAT (digital audio tape recorder) adapted to record the data from a computer or the like in accordance with the DAT format, wherein a unit is formed of predetermined plural frames and a signal indicative of each frame number within a unit and a signal indicative of the last frame of the unit are recorded with each frame, whereby the length of the unit can be arbitrarily changed and accordingly signal processing is facilitated easily.
    Type: Grant
    Filed: February 25, 1991
    Date of Patent: July 28, 1992
    Assignee: Sony Corporation
    Inventors: Yoshizumi Inazawa, Masaki Yamada, Shiya Ozaki, Tatsuya Iijima, Hiroshi Ishibashi, Kentaro Odaka
  • Patent number: 5091805
    Abstract: An apparatus and method for recording and/or reproducing digital data employing a DAT (digital audio tape recorder) adapted to record and/or reproduce data from a computer or the like in accordance with the DAT format. Main data is recorded in a main area of a track while error detecting data for the main data recorded in the main area of the track is recorded in a sub-area of the track to thereby easily detect an error in the main data.
    Type: Grant
    Filed: October 25, 1988
    Date of Patent: February 25, 1992
    Assignee: Sony Corporation
    Inventors: Kentaro Odaka, Shinya Ozaki, Yoshizumi Inazawa, Masaki Yamada, Hiroshi Ishibashi, Tatsuya Iijima
  • Patent number: 5067131
    Abstract: An apparatus and method for recording and/or reproducing digital data employing a DAT (digitial audio tape recorder) adapted to record and/or reproduce data from a computer or the like in accordance with the DAT format. Main data is recorded in a main area of a track while error detecting data for the main data recorded in the main area of the track is recorded in a sub-area of the track to thereby easily detect an error in the main data.
    Type: Grant
    Filed: May 25, 1990
    Date of Patent: November 19, 1991
    Assignee: Sony Corporation
    Inventors: Kentaro Odaka, Shinya Ozaki, Yoshizumi Inazawa, Masaki Yamada, Hiroshi Ishibashi, Tatsuya Iijima
  • Patent number: 5044251
    Abstract: An electronic musical instrument can execute a musical performance with two timbres mixed together by operating a single key, for example. Of the two timbres, a master timbre is set in normal mode and is stored in a first memory, while a slave timbre is selected in tone mix mode and is stored in a second memory. Each timbre can be altered as desired. To alter the master timbre, timbre switches are operated after the mode is temporarily changed to normal mode. To alter the slave timbre, the timbre switches are operated in tone mix mode. When the tone mix mode is set, this electronic musical instrument can permit a player to easily alter tone parameters such as the volume, pitch and attack delay time of each timbre.
    Type: Grant
    Filed: April 3, 1989
    Date of Patent: September 3, 1991
    Assignee: Casio Computer Co., Ltd.
    Inventors: Takashi Matsuda, Tatsuya Iijima
  • Patent number: 5018430
    Abstract: Initial touch data or after touch data is obtained by operating a play input unit, such as keys or strings. A musical tone whose timbre or volume changes by the touch data is obtained. A tone generator has a plurality of sound source lines. Desired waveform data is selected by the touch data for each line. Only one type of the selected waveform data that is segmented at a touch split point is outputted for each line. The musical tone may be detuned by finely staggering the reference frequency, for each line. An envelope waveform may be applied to the musical tone for each line.
    Type: Grant
    Filed: June 15, 1989
    Date of Patent: May 28, 1991
    Assignee: Casio Computer Co., Ltd.
    Inventors: Tatsuya Iijima, Hiroshi Morokuma